Rotary draw works



ROTARY DRAW WORKS Filed May 21, 1929 2 Sheets-Sheet l Sept. 5, 1933. E. TIMBS 1,925,349

ROTARY DRAW WORKS Filed May 21. 1929 2 Sheets-Sheet 2 @wf I e gmc/Mn Patented Sept. v5, 1933 UNITED STATES PATENT orner.

Y 1,925,349 v l k y ROTARY DRAW WORKS Edward Timbs, Los Angeles, Calif., assigner to The National Supply Company of Delaware, New York, N. Y., a corporation of Delaware f Application May 21, 1929. serial No. 364,755

claims. (C1. 25a-i9) This invention relates to rotaryV drawworks as used in connection with fa rotary process of drilling wells. In rotary drawworks as commonly constructed there -is provided a frame Work in- 5 cluding three posts upon which there is supported a drumshaft and a line shaft.' The line shaft is 'driven from a prime mover and a driving connection is formed from the line shaft to a rotary machine. The line shaft is supported near the lo upper end of the posts and the driving connection from the line shaft to the rotary machine usually includes a sprocket mounted on the line shaft which is connected through a chain with the rotary table drive sprocket.

, ..15 It is an object of this invention to provide a means'for driving a rotary machine from a rotary drawworks including a jack shaft `supported by the posts of the drawworks at a point near the lower end of theposts or near the floor of the rig within which the drawworks is mount- `ed and on ,the rear of said posts and from which jack shaft a drive connection is formed tothe rotary machine.

AnotherY object of this invention is to provide shaft and a jackl shafty located at a point near the floor of ,thedrawworks Other objects and advantages of this invenpanying drawings. Y

. In the drawings: y

Figure 1 is a diagrammatic View illustrating a k rotary drawworks embodying 'this invention asV operativelyconnected with a rotary machine.

Figure 2 isa fragmental view of a rotary drawworks embodying this invention.

Figure 3 is a side elevation thereof.

Figure 4 is an enlarged rear elevation of the jack shaft supporting bearing bracket embodied in this invention.

Figure 5 is a sectional edgev elevation thereof taken substantially on the line 5-5 of Figure 4.

In the preferred embodiment of this invention illustrated in the accompanying drawings, there is disclosed a rotary drawworks including a frame 1 composed of spaced posts 2, 3 and 4 connected together by a cross-beam 5. Y Rotatably supported by the posts 2, 3 and 4 on the rear thereof is a line shaft 6. Journaled in bearings secured to the posts 2 and 3 is al drum shaft '7 carrying a drum 8. The drum shaft 7 is driven from the line shaft 6 through a plurality of drive connections composed of sprockets 9 secured `machine close to the floor. y v is drivenfrom the line shaft 6 by means ofl a a rotarydrawworks including a line shaft, a drum 'c1utch, face 23 of the sprocket 18.

`collar 22 vand is pivotally connected by a bracket to the line shaft 6 over which chains 10 are trained, and which chains pass over corresponding sprockets-11 mounted onthe drumA shaft 7. The drum shaft 7 is supported on the front face of the posts 2 and 3 below the lline shaft 6. The 60 line shaft 6 is, as in accordance with common practice, mounted `at a point near the upper end of the posts 2, 3 and 4. Y

Means are provided for driving rotary machine 12 from the rotary drawworksg which means are V65 preferably of the following construction:

A jack shaft 13 is adjustably supportedfrorn the rear of the posts 3 and 4 of the rotary draw- Works at a point near the floor 14 of the derrick Within which the drawworksvis mounted. The jack shaft 13 is mounted near the floor and at the rear ofthe posts3 and 4vand is provided With' a rotary drive Ysprocket. 15' overv which a chain 16 is trained. The ch'ainl passes over the drive sprocket 1'7 of the rotary drawworks and 75 thus passes from the drawworks Vtov the rotary The jackshaft 13 sprocket and chain drive` consisting of Ythe [6` and a corresponding sprocket 19 mounted on the Vjackshaft 13. A 'chain 20 connects the sprockets 18 and 19. A clutch 21 is provided for releasibly engaging the sprocket 18 with the line shaftr and includes a clutch collar 22 splined on theA line shaft 6 in position to engage the A shifting fork 24 is operatively connected with the clutch supported by the beam5. The opposed end 90 25 ofthe actuating fork 24 may be connected Hby any suitable form of link mechanism extending to a point of accessibility in the derrick.

Means are provided for adjustably mounting the jack shaft 13, which are herein illustrated as kincluding a bearing bracket 26, which is pivotally secured by a pin 27 to a bracket plate 28. Elonf gated slots 29 vare formed in the opposed ends of the bearing bracket 26 and a corresponding elongated slot 30 is formed in the bearing plate 28.. 100 Bolts 31 and 32 are passed through these elon` gated slots and through the posts 3 and'4 of the rotary drawworks.

An adjustment bracket 33 is secured to eachl of the posts 3 and 4 in position so that its acl-105 justment screw 34 engages the bearing bracketlv `v 26. The adjustment screw 34 is screw-threaded throughthe bearing bracket 33 andis' provided with a lock nut 35, By adjusting the screw 34,

the vertical position of the'jack shaft 13'may be` *110' Hso a plurality of shims 36 which are interposed bea4 tween the lower end of the bearing bracket 26 and the posts 3 and 4 on the lower bolt 32.

By adding to or takingaway shims 36, the shaft 13 may be adjusted in transverse position as the bearing bracket 26 pivots on the pinA 27. A

lclamping cap 37 is secured. to the bearing brack` et 26 by means of bolts 38. The clampingv cap 23'? holds the shaft 13 from revolving by prifividing a at face 39 which engages a flat portion'of `the shaft 13. The rotary drive sprocket 5 is journaled-on jack'shaft' 13. 1 A sleeve 4.0 is journaled onA the jack shaft 13 and carries the sprocket 19 and the chine drive sprocket 15. The sleeve (lo is sufficient longitudinal extent to fill the line shaft between the bearing brackets 26 to hold the sprockets 15 and 19 in correct longitudinal pesiftionon the shaft 13.

Having fully described my invention, it is to be understood that Iv do not wish to be to the Vdetails herein set forth, but myinventionis of the full scope of the appended claims.

Iclaim: v: y 1. In a rotary drawworks, the combination of ,i a frame including a paircof spaced posts, a line shaft rotatably supported by said posts near their `upper endsr and upon `the rear of said posts, a

drum shaft supportedY on the said frame in spaced l' relationlto said line shaftand on the fron-t face of .said frame, a jack shaft supported by said posts below said drum shaft in close proximity to the lower -endsofsaid `posts and onthe back ,faces of; said-pos ts,means for driving the drum shaftY from the line sha fta rotary, drive sprocket journaled on the. jack shaft,and means for driv-y ing therotary drive sprocketfrom the line shaft.

2. In ajrotary drawworks, the con ibinationr of a framev including Va pair of spaced posts, aline shaft rotatably supported by said posts'neartheir drum shaft from the line shaft, a rotary drive sprocket journaled on the vjack shaft, means for driving the rotary drive sprocket from the line shaft, the latter said means including a sprocket mounted on the line shaft, a sleeve journaled on the jack shaft' upon which the rotary drive sprocket is secured, a second sprocket secured to he said sleeve, means connecting the latter said sprocket and the said line shaft sprocket, and clutch means for releasibly securing the line shaft sprocket to the line shaft.

3. In a rotary drawvvorks, the combination of la frame including a pair of spaced posts, a line shaft rotatably supported by said posts near their upper ends, a drum shaft supported on said frame in spaced relation t the line shaft, a jackshaft supported by said posts below said drum shaft close proximity to the lower ends of said posts and from the rear faces of said posts, means for drivingl the drum shaft from the line shaft, a rotary drive sprocket journaled on the jack shaft, means for driving the rotary drive sprocket from tA e line shaft, means for adjusting'the vertical position of the jack shaft, and meansfor adjustingthe horizontal position of the jack shaft.

Kl. 1n a rotary drawworks, the combination of frame including a pair of spaced posts, a line shaft rotatably supported by said posts near their upper ends, a drum shaft supported on said frame in spaced relation tosaid line shaft, a jack shaft supported by said posts below said drum shaft in close proximity'to the lower ends of said posts andy from the'rear facesof said posts, said jack shaft supporting means includinga bracket ad.

'jackshafd and means for driving the rotary machine drive sprocket fromthe line shaft.

5.1n a rotary drawvrorks, the combination of a frame, including a pair of spaced' posts, a line shaft rotatable supported by said posts near their upperends, a drum shaft supported on saidv frame y in spaced relation to said line shaft, a stationary. ,jackshaft supported by saidposts inv close proX- irnity to the lower ends Vof, said posts and upon therear faces of said posts, said jackshaft support including brackets, means for pivotally and slidably securingthe brackets'to the post' to 'enable adjustment of both the vertical and horizontal position of said'jackshaft,asleeve 'journaled on the jackshaft, a driven sprocket o n the sleeve, means for driving the driven sprocket from the line shaft,.and a rotarysmachine drive Y sprocket mountedon ythe sleeve.l Y.

' EDWARD TIMES. 

